{
  "manageEntity": {
    "action": "Save",
    "entityId": "258385859",
    "entityType": "Track",
    "nonce": "0xfa6e3f830c79ce7c4c9b5b19b490501e6fe5d32df47fe0b406bb1486fead8cd1",
    "signature": "0x6db1272234f3eb3f09f9fefdec4e6a96d86f8c76751f2cc7916ef932f2a98f4a10ea8755e2b4f9372c98a0e089070c92b2e268fb118cedbf4fa4e76e0c8e2bda1b",
    "signer": "0x2c232E026B83c9880E3133769a08b5951c0b6C75",
    "userId": "713107840"
  }
}